Which of the following is a common type of intersection?

While T-intersections are indeed a common type of intersection, the choice that encompasses all options provided is a more comprehensive correct answer. Roundabouts, diamond intersections, and T-intersections all serve specific traffic management purposes and are utilized in various traffic scenarios.

Roundabouts help improve traffic flow and reduce the likelihood of severe accidents by allowing vehicles to yield rather than come to a complete stop. Diamond intersections are typically found in highway interchanges, facilitating the interchange of traffic between major roads, while T-intersections are a simple configuration that efficiently handles traffic at a three-way intersection. Evaluating the options collectively highlights that they all represent established intersection types, making the all-inclusive option the more comprehensive answer.